Denitration injection metering distribution device

Abstract

The utility model discloses a denitration injection metering distribution device, which relates to the technical field of denitration, and comprises a denitration pipeline, a breather pipe is arranged in the denitration pipeline, a rotating shaft is arranged in the breather pipe, the upper end of the rotating shaft is rotatably connected with a fixed block, and the lower end of the rotating shaft is positioned in a breather box and is provided with fan blades. A columnar metal block is arranged on the rotating shaft, magnets are symmetrically arranged on the two sides of the columnar metal block, the magnets are fixedly connected with the inner wall of the ventilation pipe, the magnets do not make contact with the columnar metal block, gas in the denitration pipeline rises, and the fan blades drive the rotating shaft to rotate under the action of rising airflow; the rotating shaft drives the columnar metal block to rotate synchronously in the rotating process, meanwhile, magnets on the two sides of the columnar metal block are magnets with the same magnetic pole, the columnar metal block drives the rotating shaft to rotate in an accelerated mode under the action of mutual exclusion force, and therefore the effect that gas in the denitration pipeline body circulates in an accelerated mode is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of denitration, in particular to a denitration injection metering and distributing device. Background Art

[0002] In the field of flue gas denitrification, two methods, selective catalytic reduction (SCR) and non-selective catalytic reduction (SNCR), have been widely used. Both methods use NH3 and other reducing agents to reduce NOx to harmless N2 and H2O. The SNCR method is to spray a reducing agent aqueous solution such as ammonia or urea into the flue gas at 850-1150°C to achieve the reduction reaction of NOx. Since it basically does not occupy the space of the combustion equipment, the transformation workload is small and the transformation cycle is short, it has been widely used.

[0003] A flue gas denitrification injection device described in the existing patent announcement number CN 216321090 U includes a reaction tower, an agent pipeline is provided on the outer side of the reaction tower, and a metering control pump and an air compressor are sequentially equipped on the agent pipeline. At least one group of injection units are evenly arranged on the inner wall of the reaction tower, and each group includes three injection units. One injection unit consists of a main nozzle, two secondary nozzles, and two nozzles, wherein the two secondary nozzles are vertically upwardly arranged at the vertex and 1 / 2 of the length of the main nozzle, respectively, and are detachably connected to the main nozzle. A nozzle is detachably connected to the upper end of each secondary nozzle, and the injection direction is the same as the flue gas inflow direction, so as to improve the denitrification reaction effect and reduce the agglomeration and ash accumulation phenomenon. However, the agent cannot be fully mixed with the flue gas, and the mixing is not uniform, resulting in low denitrification efficiency.

[0004] Based on this, a denitrification injection metering and dispensing device is now provided, which can eliminate the disadvantages of the existing devices. Utility Model Content

[0005] The utility model aims to provide a denitration injection metering distribution device to solve the problem in the background technology that the reagent cannot be fully mixed with the flue gas and the mixing is not uniform, resulting in low denitration efficiency.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A denitration injection metering and dispensing device comprises a denitration pipeline, a ventilation pipe is arranged in the denitration pipeline, a ventilation box is arranged at the bottom of the denitration pipeline, a rotating mechanism is arranged in the ventilation pipe, and an injection mechanism is arranged above the ventilation pipe in the denitration pipeline.

[0008] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:

[0009] In an optional solution: a plurality of air holes are arranged at the bottom end of the ventilation box, and the top of the ventilation box is connected with the inside of the ventilation pipe.

[0010] In an optional solution: a fixing ring is fixedly connected to the top of the ventilation pipe, the fixing ring is fixedly connected to the inner wall of the denitrification pipe, a fixing block is arranged inside the fixing ring, and the fixing block is fixedly connected to the inner wall of the fixing ring through a plurality of support rods.

[0011] In an optional solution: a rotating shaft is arranged in the ventilation pipe, a top end of the rotating shaft is rotatably connected to a fixed block, and a fan blade is arranged in a ventilation box at a bottom end of the rotating shaft.

[0012] In an optional solution: the rotating mechanism includes a columnar metal block, the columnar metal block is fixedly connected to the rotating shaft, magnets are symmetrically arranged on both sides of the columnar metal block, the magnets are fixedly connected to the inner wall of the ventilation pipe, and the magnets do not contact the columnar metal block.

[0013] In an optional scheme: the injection mechanism includes a connecting head, which is fixedly connected to the fixed block, a connecting pipe is provided on one side of the connecting head, the connecting pipe is connected to an external ammonia water tank, an atomizing nozzle is provided at the top of the connecting pipe, and a spherical tube is provided at the top of the denitrification pipeline outside the atomizing nozzle.

[0014] In an optional solution: an air inlet pipe is arranged on one side below the denitration pipeline, and an air outlet pipe is arranged on the top of the spherical tube.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] The utility model provides a ventilation pipe in the denitration pipeline, a ventilation box is provided at the bottom end of the ventilation pipe, a plurality of air holes are provided at the bottom end of the ventilation box, the top of the ventilation box is connected with the inside of the ventilation pipe, a rotating shaft is provided in the ventilation pipe, the upper end of the rotating shaft is rotatably connected with a fixed block, and the lower end is located in the ventilation box and provided with fan blades, a columnar metal block is provided on the rotating shaft, magnets are symmetrically provided on both sides of the columnar metal block, the magnets are fixedly connected to the inner wall of the ventilation pipe, and the magnets are not in contact with the columnar metal block, the gas in the denitration pipeline rises, and the fan blades drive the rotating shaft to rotate under the action of the rising airflow, and the columnar metal is driven to rotate synchronously during the rotation of the rotating shaft, and at the same time, because the magnets on both sides of the columnar metal block are magnets with the same magnetic poles, the columnar metal block drives the rotating shaft to rotate faster under the action of the mutual repulsive force, thereby achieving the effect of accelerating the circulation of the gas inside the main body of the denitration pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 It is a schematic diagram of the internal structure of the utility model.

[0019] Figure 3 It is a structural schematic diagram of one side of the ventilation pipe of the utility model.

[0020] Figure 4 It is a schematic diagram of the structure of the other side of the ventilation pipe of the utility model.

[0021] Notes on the accompanying drawings: 1. Denitrification pipeline; 2. Air inlet pipe; 3. Spherical tube; 4. Air outlet pipe; 5. Connecting pipe; 6. Ventilation box; 7. Ventilation pipe; 8. Fixing ring; 9. Fixing block; 10. Support rod; 11. Connecting head; 12. Atomizing nozzle; 13. Rotating shaft; 14. Magnet; 15. Columnar metal block; 16. Fan blades; 17. Air holes. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] In one embodiment, Figure 1-Figure 4 As shown, a denitration injection metering and dispensing device includes a denitration pipeline 1, a ventilation pipe 7 is arranged in the denitration pipeline 1, a ventilation box 6 is arranged at the bottom of the denitration pipeline 1, a rotating mechanism is arranged in the ventilation pipe 7, and an injection mechanism is arranged above the ventilation pipe 7 in the denitration pipeline 1. The rotating mechanism can accelerate the rotation of the rotating shaft 13, and the injection mechanism can inject ammonia water into the flue gas.

[0024] In one embodiment, Figure 4 As shown, a plurality of air holes 17 are provided at the bottom of the ventilation box 6 , and the top of the ventilation box 6 is connected with the inside of the ventilation pipe 7 , so that smoke enters the ventilation pipe 7 through the air holes 17 .

[0025] In one embodiment, Figure 2 As shown, a fixing ring 8 is fixedly connected to the top of the ventilation pipe 7, and the fixing ring 8 is fixedly connected to the inner wall of the denitrification pipeline 1. A fixing block 9 is arranged inside the fixing ring 8, and the fixing block 9 is fixedly connected to the inner wall of the fixing ring 8 through a plurality of support rods 10. The flue gas in the ventilation pipe 7 is discharged through the fixing ring 8.

[0026] In one embodiment, Figure 4 As shown, a rotating shaft 13 is arranged in the ventilation pipe 7, the top end of the rotating shaft 13 is rotatably connected to the fixed block 9, and the bottom end of the rotating shaft 13 is located in the ventilation box 6 and a fan blade 16 is arranged, and the fan blade 16 rotates under the action of the rising airflow.

[0027] In one embodiment, Figure 4As shown, the rotating mechanism includes a columnar metal block 15, which is fixedly connected to the rotating shaft 13. Magnets 14 are symmetrically arranged on both sides of the columnar metal block 15. The magnets 14 are fixedly connected to the inner wall of the ventilation pipe 7, and the magnets 14 are not in contact with the columnar metal block 15. Under the action of the rising airflow, the fan blades 16 drive the rotating shaft 13 to rotate. During the rotation of the rotating shaft 13, the columnar metal block 15 is driven to rotate synchronously. The magnets 14 on both sides of the columnar metal block 15 are magnets with the same magnetic poles. Under the action of the mutual repulsion force, the rotation of the columnar metal block 15 can be accelerated, thereby accelerating the circulation of smoke.

[0028] In one embodiment, Figure 2 As shown, the injection mechanism includes a connector 11, which is fixedly connected to a fixed block 9. A connecting pipe 5 is provided on one side of the connector 11, and the connecting pipe 5 is connected to an external ammonia water tank. An atomizing nozzle 12 is provided on the top of the connecting pipe 5. A spherical tube 3 is provided on the outside of the atomizing nozzle 12 at the top of the denitrification pipeline 1. The atomizing nozzle 12 can spray ammonia water, and the flue gas and ammonia water are fully contacted in the spherical tube 3 to improve the working efficiency.

[0029] In one embodiment, Figure 1 As shown, an air inlet pipe 2 is provided at one side below the denitration pipeline 1, and an air outlet pipe 4 is provided at the top of the spherical tube 3. The flue gas enters from the air inlet pipe 2 and is discharged from the air outlet pipe 4.

[0030] The above embodiment discloses a denitrification injection metering and distribution device. Before use, the staff needs to perform an installation inspection on the device to check whether the installation and connection of each component are reasonable and whether they can meet the use requirements. The device can be used after the inspection is completed. During use, the gas in the denitrification pipeline 1 rises, and the fan blades 16 drive the rotating shaft 13 to rotate under the action of the rising airflow. During the rotation of the rotating shaft 13, the columnar metal block 15 is driven to rotate synchronously. At the same time, since the magnets 14 on both sides of the columnar metal block 15 are magnets with the same magnetic poles, the columnar metal block 15 drives the rotating shaft 13 to rotate faster under the action of the mutual repulsive force, thereby achieving the effect of accelerating the circulation of the gas inside the denitrification pipeline 1, and the atomizing nozzle 12 sprays ammonia water, and the flue gas and ammonia water are fully contacted in the spherical tube 3, thereby improving work efficiency.

[0031] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A denitration injection metering and dispensing device, comprising a denitration pipeline (1), characterized in that: A vent pipe (7) is provided in the denitration pipeline (1), a vent box (6) is provided at the bottom end of the denitration pipeline (1), a rotating mechanism is provided in the vent pipe (7), and an injection mechanism is provided above the vent pipe (7) in the denitration pipeline (1); A fixing ring (8) is fixedly connected to the top end of the ventilation pipe (7), and the fixing ring (8) is fixedly connected to the inner wall of the denitration pipe (1). A fixing block (9) is provided inside the fixing ring (8), and the fixing block (9) is fixedly connected to the inner wall of the fixing ring (8) via a plurality of support rods (10).

2. The denitration injection metering and dispensing device according to claim 1, characterized in that: A plurality of air holes (17) are provided at the bottom end of the ventilation box (6), and the top of the ventilation box (6) is connected to the interior of the ventilation pipe (7).

3. The denitration injection metering and dispensing device according to claim 1, characterized in that: A rotating shaft (13) is arranged in the ventilation pipe (7), the top end of the rotating shaft (13) is rotatably connected to the fixed block (9), and the bottom end of the rotating shaft (13) is located in the ventilation box (6) and is provided with a fan blade (16).

4. The denitration injection metering and dispensing device according to claim 1, characterized in that: The rotating mechanism comprises a columnar metal block (15), the columnar metal block (15) being fixedly connected to the rotating shaft (13), magnets (14) being symmetrically arranged on both sides of the columnar metal block (15), the magnets (14) being fixedly connected to the inner wall of the ventilation pipe (7), and the magnets (14) not being in contact with the columnar metal block (15).

5. The denitration injection metering and dispensing device according to claim 1, characterized in that: The injection mechanism comprises a connecting head (11), the connecting head (11) being fixedly connected to a fixing block (9), a connecting pipe (5) being provided on one side of the connecting head (11), the connecting pipe (5) being connected to an external ammonia water tank, an atomizing nozzle (12) being provided at the top end of the connecting pipe (5), and a spherical tube (3) being provided at the top end of the denitration pipeline (1) and located outside the atomizing nozzle (12).

6. The denitration injection metering and dispensing device according to claim 5, characterized in that: An air inlet pipe (2) is arranged at one side below the denitration pipeline (1), and an air outlet pipe (4) is arranged at the top end of the spherical tube (3).

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